PMID- 23401324
OWN - NLM
STAT- MEDLINE
DCOM- 20130725
LR  - 20181202
IS  - 1552-8618 (Electronic)
IS  - 0730-7268 (Linking)
VI  - 32
IP  - 5
DP  - 2013 Apr
TI  - Plant consumption by grizzly bears reduces biomagnification of salmon-derived 
      polychlorinated biphenyls, polybrominated diphenyl ethers, and organochlorine 
      pesticides.
PG  - 995-1005
LID - 10.1002/etc.2162 [doi]
AB  - The present study characterizes the uptake and loss of persistent organic 
      pollutants (POPs) in grizzly bears (Ursus arctos horribilis) by sampling and 
      analyzing their terrestrial and marine foods and fecal material from a remote 
      coastal watershed in British Columbia, Canada. The authors estimate that grizzly 
      bears consume 341 to 1,120 microg of polychlorinated biphenyls (PCBs) and 3.9 to 
      33 microg of polybrominated diphenyl ethers daily in the fall when they have access 
      to an abundant supply of returning salmon. The authors also estimate that POP 
      elimination by grizzly bears through defecation is very low following salmon 
      consumption (typically <2% of intake) but surprisingly high following plant 
      consumption (>100% for PCBs and organochlorine pesticides). Excretion of 
      individual POPs is largely driven by a combination of fugacity (differences 
      between bear and food concentrations) and the digestibility of the food. The 
      results of the present study are substantiated by a principal components 
      analysis, which also demonstrates a strong role for log KOW in governing the 
      excretion of different POPs in grizzly bears. Collectively, the present study's 
      results reveal that grizzly bears experience a vegetation-associated drawdown of 
      POPs previously acquired through the consumption of salmon, to such an extent 
      that net biomagnification is reduced.
CI  - Copyright (c) 2013 SETAC.
FAU - Christensen, Jennie R
AU  - Christensen JR
AD  - Institute of Ocean Sciences, Fisheries & Oceans Canada, Sidney, British Columbia, 
      Canada.
FAU - Yunker, Mark B
AU  - Yunker MB
FAU - MacDuffee, Misty
AU  - MacDuffee M
FAU - Ross, Peter S
AU  - Ross PS
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130325
PL  - United States
TA  - Environ Toxicol Chem
JT  - Environmental toxicology and chemistry
JID - 8308958
RN  - 0 (Environmental Pollutants)
RN  - 0 (Halogenated Diphenyl Ethers)
RN  - 0 (Hydrocarbons, Chlorinated)
RN  - 0 (Pesticides)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
SB  - IM
MH  - Animals
MH  - British Columbia
MH  - Environmental Exposure/analysis/statistics & numerical data
MH  - Environmental Pollutants/*metabolism
MH  - Feces/chemistry
MH  - Female
MH  - Halogenated Diphenyl Ethers/*metabolism
MH  - Herbivory
MH  - Hydrocarbons, Chlorinated/*metabolism
MH  - Male
MH  - Pesticides/*metabolism
MH  - Polychlorinated Biphenyls/*metabolism
MH  - Salmon/*metabolism
MH  - Seasons
MH  - Ursidae/metabolism/*physiology
EDAT- 2013/02/13 06:00
MHDA- 2013/07/26 06:00
CRDT- 2013/02/13 06:00
PHST- 2012/08/08 00:00 [received]
PHST- 2012/09/21 00:00 [revised]
PHST- 2012/12/20 00:00 [accepted]
PHST- 2013/02/13 06:00 [entrez]
PHST- 2013/02/13 06:00 [pubmed]
PHST- 2013/07/26 06:00 [medline]
AID - 10.1002/etc.2162 [doi]
PST - ppublish
SO  - Environ Toxicol Chem. 2013 Apr;32(5):995-1005. doi: 10.1002/etc.2162. Epub 2013 
      Mar 25.